About

Blackbody Radiation Spectrum

The Blackbody Radiation Spectrum model shows six fixed-temperature curves between Tmin and Tmax and a red variable-temperature curve that can be adjusted using a slider. The wavelength is measured in nm (nanometer) and the intensity is measured in W.e-5 / (m2.nm). Users can adjust Tmin and Tmax to change the temperature range that is displayed.

Credits:

The Blackbody Radiation Spectrum model was created by created by Fu-Kwun Hwang, customized by Loo Kang WEE, and edited by Wolfgang Christian using the Easy Java Simulations (EJS) version 4.2 authoring and modeling tool.  An applet version of this model is available on the NTNU website < http://www.phy.ntnu.edu.tw/ntnujava/ >.

You can examine and modify this compiled EJS model if you run the model (double click on the model's jar file), right-click within a plot, and select "Open EJS Model" from the pop-up menu.  You must, of course, have EJS installed on your computer.  Information about EJS is available at: <http://www.um.es/fem/Ejs/> and in the OSP comPADRE collection <http://www.compadre.org/OSP/>.

 

Translations

Code	Language		Translator	Run

Credits

Designed by Fu-Kwun Hwang http://www.phy.ntnu.edu.tw/ntnujava/ and weelookang@gmail.com; lookang

Briefing Document: Black-body Radiation JavaScript HTML5 Applet Simulation Model

This briefing document summarizes the key information about the "Black-body radiation JavaScript HTML5 Applet Simulation Model" from Open Educational Resources / Open Source Physics @ Singapore. The model is designed to help users understand the concept of blackbody radiation and its spectrum.

Main Themes and Key Ideas:

• Blackbody Radiation Spectrum Visualization: The core function of the applet is to visually represent the blackbody radiation spectrum. It displays the relationship between temperature, wavelength, and intensity of emitted radiation.
• Interactive Simulation: The applet allows users to interactively explore the blackbody radiation spectrum. Users can adjust the temperature using a slider and observe the corresponding changes in the spectrum. Specifically, they can change the range of displayed temperatures by adjusting "Tmin and Tmax".
• Educational Tool: The simulation is designed as an educational resource for teaching and learning about blackbody radiation. It provides a hands-on approach to understanding the concept.
• Open Source and Customizable: The model is built using Easy Java Simulations (EJS) and is open source. Users can examine and modify the compiled EJS model, fostering a deeper understanding and customization possibilities. "You can examine and modify this compiled EJS model if you run the model (double click on the model's jar file), right-click within a plot, and select "Open EJS Model" from the pop-up menu."
• Accessibility: The model is embedded in a webpage using an iframe, making it easily accessible and embeddable in other online resources.
• Units: The wavelength is measured in nanometers (nm), and the intensity is measured in W.e-5 / (m2.nm).

Key Facts:

• Model Name: Black-body radiation JavaScript HTML5 Applet Simulation Model
• Purpose: To visualize and interactively explore the blackbody radiation spectrum.
• Creators: Fu-Kwun Hwang, Loo Kang WEE, and Wolfgang Christian.
• Technology Used: Easy Java Simulations (EJS) version 4.2.
• Accessibility: Available as a JavaScript HTML5 applet and embeddable in webpages.
• Customization: The model can be examined and modified using EJS (requires EJS installation).
• Temperature Control: Users can adjust the temperature using a slider.
• Temperature Range Control: Users can also adjust "Tmin and Tmax" to change the temperature range that is displayed.
• Units of Measure: Wavelength is measured in "nm (nanometer)" and the intensity is measured in "W.e-5 / (m2.nm)".

Quotes:

• "The Blackbody Radiation Spectrum model shows six fixed-temperature curves between Tmin and Tmax and a red variable-temperature curve that can be adjusted using a slider."
• "The wavelength is measured in nm (nanometer) and the intensity is measured in W.e-5 / (m2.nm)."
• "You can examine and modify this compiled EJS model if you run the model (double click on the model's jar file), right-click within a plot, and select 'Open EJS Model' from the pop-up menu."

Overall Significance:

This Blackbody Radiation Spectrum model is a valuable open educational resource for visualizing and understanding a key concept in physics. Its interactive nature and open-source design make it a powerful tool for both students and educators. The ability to modify the model further enhances its educational potential.

Blackbody Radiation Simulation: A Study Guide

Quiz

Answer the following questions in 2-3 sentences each.

1. What does the Blackbody Radiation Spectrum model simulate?
2. What units are used to measure wavelength in the simulation?
3. What units are used to measure intensity in the simulation?
4. What is the purpose of the adjustable temperature slider?
5. Who created the original Java applet version of this model?
6. Who is the model customized by?
7. What software was used to create this model?
8. Where can users access more information about Easy Java Simulations (EJS)?
9. What range of fixed temperature curves are displayed in the simulation?
10. According to the licensing agreement, what does the user need to read and who should they contact before using EasyJavaScriptSimulations Library for commercial purposes?

Quiz Answer Key

1. The Blackbody Radiation Spectrum model simulates the relationship between temperature and the spectrum of electromagnetic radiation emitted by a blackbody. It shows how the intensity and wavelength distribution of the radiation changes with varying temperatures.
2. Wavelength in the simulation is measured in nanometers (nm). This unit allows for precise representation of the different wavelengths present in the electromagnetic spectrum.
3. Intensity in the simulation is measured in W.e-5 / (m2.nm). This unit expresses the power of the radiation per unit area and per unit wavelength interval.
4. The adjustable temperature slider allows users to explore the blackbody spectrum at different temperatures. Moving the slider changes the temperature and dynamically updates the red variable-temperature curve, illustrating the impact on the emitted radiation's intensity and wavelength.
5. Fu-Kwun Hwang created the original Java applet version of this Blackbody Radiation Spectrum model. His work formed the foundation for the customized and updated simulation.
6. Loo Kang Wee customized the Blackbody Radiation Spectrum model. He adapted the original Java applet into the current interactive simulation.
7. The Blackbody Radiation Spectrum model was created using Easy Java Simulations (EJS) version 4.2. EJS is an authoring and modeling tool that allows for the creation of interactive simulations.
8. Users can find more information about Easy Java Simulations (EJS) at http://www.um.es/fem/Ejs/ and in the OSP comPADRE collection at http://www.compadre.org/OSP/. These resources provide documentation, tutorials, and examples for using EJS.
9. The simulation shows six fixed-temperature curves between Tmin and Tmax. Users can adjust Tmin and Tmax to change the temperature range that is displayed.
10. According to the licensing agreement, for commercial use of EasyJavaScriptSimulations Library, users need to read https://www.um.es/fem/EjsWiki/Main/EJSLicense and contact fem@um.es directly. This ensures compliance with the usage terms and conditions set by the developers.

Essay Questions

Consider the following essay questions and formulate well-supported arguments based on the material.

1. Discuss the significance of blackbody radiation in the development of quantum mechanics. How does the simulation help in understanding the limitations of classical physics in explaining this phenomenon?
2. Explain how the Blackbody Radiation Spectrum model can be used as a tool for teaching and learning about the electromagnetic spectrum. What are some specific learning goals that can be achieved using this simulation?
3. Describe the impact of Open Source Physics (OSP) resources like this simulation on science education. What are the advantages and disadvantages of using OSP materials in the classroom?
4. Analyze the design and functionality of the Blackbody Radiation Spectrum model. How does the interactive nature of the simulation enhance understanding compared to static representations of blackbody radiation?
5. Compare and contrast the Java applet version and the JavaScript HTML5 version of the simulation. What are the benefits of using HTML5 for educational simulations in modern web environments?

Glossary of Key Terms

• Blackbody Radiation: The electromagnetic radiation emitted by an object that absorbs all incident radiation. The spectrum and intensity of this radiation depend only on the object's temperature.
• Electromagnetic Spectrum: The range of all types of electromagnetic radiation, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
• Wavelength: The distance between successive crests or troughs of a wave, typically measured in nanometers (nm) for light.
• Intensity: The power of electromagnetic radiation per unit area, often expressed in W.e-5 / (m2.nm) in this context.
• Easy Java Simulations (EJS): A free, open-source tool used to create interactive computer simulations for science education.
• Open Source Physics (OSP): A project dedicated to providing freely available, high-quality physics simulations and resources for educators and students.
• Applet: A small application, often written in Java, that runs within another application, typically a web browser.
• HTML5: The latest version of Hypertext Markup Language, used for structuring and presenting content on the web. It allows for interactive multimedia elements without the need for plugins like Java or Flash.
• Simulation Model: A computer program that mimics a real-world system or phenomenon, allowing users to explore and experiment with different parameters and conditions.
• Temperature Range: The interval between the minimum (Tmin) and maximum (Tmax) temperatures displayed in the simulation, which can be adjusted by the user.

Sample Learning Goals

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For Teachers

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Research

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Video

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 Version:

1. http://weelookang.blogspot.sg/2016/02/vector-addition-b-c-model-with.html improved version with joseph chua's inputs
2. http://weelookang.blogspot.sg/2014/10/vector-addition-model.html original simulation by lookang

Other Resources

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FAQ on Blackbody Radiation Simulation

• What is blackbody radiation? Blackbody radiation refers to the electromagnetic radiation emitted by an object that absorbs all incident radiation. A perfect blackbody is a theoretical concept, but many objects approximate this behavior. The spectrum of emitted radiation depends only on the temperature of the blackbody, not its composition.
• What does the Blackbody Radiation Spectrum model demonstrate? The model illustrates the relationship between temperature and the spectrum of electromagnetic radiation emitted by a blackbody. It shows how the intensity and wavelength distribution of the emitted radiation change as the temperature of the blackbody is adjusted. The model displays fixed-temperature curves and a variable-temperature curve that can be adjusted.
• What units are used for wavelength and intensity in the simulation? Wavelength is measured in nanometers (nm) and intensity is measured in Watts per square meter per nanometer (W.e-5 / (m2.nm)), which can also be understood as 10^-5 W/(m^2 * nm).
• How can the temperature range displayed in the model be changed? Users can adjust the parameters Tmin and Tmax within the simulation interface to modify the minimum and maximum temperatures shown on the graph, effectively changing the temperature range displayed.
• Who created this Blackbody Radiation Spectrum model? The Blackbody Radiation Spectrum model was created by Fu-Kwun Hwang, customized by Loo Kang WEE, and edited by Wolfgang Christian using the Easy Java Simulations (EJS) version 4.2 authoring and modeling tool.
• What is Easy Java Simulations (EJS)? Easy Java Simulations (EJS) is a free authoring and modeling tool used to create interactive computer models and simulations, particularly in the field of physics education. It allows users to build and modify simulations without extensive programming knowledge.
• Can I modify the simulation model myself? Yes, you can examine and modify the compiled EJS model if you have EJS installed on your computer. To do so, run the model, right-click within a plot, and select "Open EJS Model" from the pop-up menu.
• Where can I find more resources related to physics simulations and education? You can find more information about EJS at http://www.um.es/fem/Ejs/ and in the OSP comPADRE collection at http://www.compadre.org/OSP/. The Open Source Physics @ Singapore website also provides a wide variety of other interactive resources and simulations for physics education.